/**
 * Write a description of class CoreFeatures here.
 *
 * @author (your name)
 * @version (a version number or a date)
 */
public class CoreFeatures extends MainApplication {
    // instance variables - replace the example below with your own
    private double x;
    private double addedNumbers;
    //addition
    private double subtractedNumbers;
    //subtraction
    private double multipliedNumbers;
    //multiplication
    private double dividedNumbers;
    //divide
    private double squaredNumber;
    //square
    private double squareRoot;
    //square root
    private boolean calcRunning;
    //calculator status
    private double invertedNumber;
    //changing the sign of a number
    /**
     * Constructor for objects of class CoreFeatures
     */
    public CoreFeatures(){
        // initialise instance variables
        x = 0;
    }

    public double addNumbers(double adding1, double adding2){
        addedNumbers = adding1 + adding2;
        return addedNumbers;}

    public double subtractNumbers(double subtracting1, double subtracting2){
        subtractedNumbers = subtracting1 - subtracting2;
        return subtractedNumbers;}

    public double multiplyNumbers(double multiplying1, double multiplying2){
        multipliedNumbers = multiplying1 * multiplying2;
        return multipliedNumbers;}

    public double divideNumbers(double dividing1, double dividing2){
        if (dividing2 == 0){
            System.out.println("**ERROR** CANNOT DIVIDE BY ZERO.");} else {
            dividedNumbers = dividing1 / dividing2;
            return dividedNumbers;}

        /*double userCorrectedInput = Console.getDoubleInput("**Err** CANNOT DIVIDE BY ZERO.  Please clear the calculator.");
        return userCorrectedInput;*/

        /*dividedNumbers = dividing1 / dividing2;
        return dividedNumbers;*/
    return dividedNumbers;}

    public double squareNumber(double squaring){
        squaredNumber = squaring * squaring;
        return squaredNumber;}

    public double squareRoot(double squareRooting){
        squareRoot = squareRoot(squareRooting);
        return squareRoot;}
    
    public double invertSign(double inverting){
        invertedNumber = inverting * -1;
        return invertedNumber;
    }
        
    public boolean calcRunning(){
        calcRunning = false;
        return calcRunning;
    }

}